AOC e2051Sn Schematic

20" LCD Color Monitor

AOC e2051Sn

Service

Service

Service

						Horizontal Frequency
						30-83 KHz
		Table of Contents
Description		Page			Description	Page
Table of Contents.......……..............................……........1					5.Block Diagram…….........………….................24
					6.Schematic……………........................................25
Revision	List.…........................................…………........2
					6.1.Main Board………...........................................25
Important	Safety	Notice.……............................……......3
					6.2.Key Board...…….............................................30
1.Monitor	Specification..............................………..........4
					7.PCB Layout..………….......................................31
2.LCD Monitor Description……………………………......5
					7.1.Main Board………...........................................31
3.Operation Instruction…………...............……..............6
					7.2.Key Board…………….....................................33
3.1.General Instructions...........................…...................6
					8.Maintainability……….........................................34
3.2.Hot Keys…………….…..............……...............6
					8.1.Equipments and Tools Requirement...............34
3.3.OSD	Setting…………….…...........................…......7
					8.2.Trouble Shooting………….............................35
4.Input/Output Specification............……………............19
					9.White-Balance, Luminance Adjustment.............39
4.1.Input Signal Connector............………….................19
					10.Monitor Exploded View………..…….…............41
4.2.Factory Preset Display Modes…….........................20
					11.BOM List…………………………………...........43
4.3.Panel Specification.....………...…………................21

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

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Revision List

	Version	Release Date	Revision History	L&T Model Name
	A00	Nov-18-2011	Initial Release	TABJT42QB7E6NNF.LF
				TABJT42KB7E6NNF.LF
	A01	Jan-17-2011	Add new model	TABJT42CB7SUNNF.LF
	A02	Mar-21-2012	Add new model	TABJT42AB7PGNNF.LF
	A03	Apr-3-2012	Add new model	TABJT42CB7SPNNF.LF
	A04	Apr-22-2012	Add new model	TABJT42KB7E6NNF.LF
	A05	May-23-2012	Add new model	TABJUA2YB7A2NNF.LF
	A06	JUL-22-2012	Add new model	TABJUA2QB7E6NNF.LF
	A07	JUL-27-2012	Add new model	TABJUA2KB7E6NNF.LF
	A08	AUG-20-2012	Add new model	TABJT42MB7VENNF.LF

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Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected.

Hereafter throughout this manual, AOC Company will be referred to as AOC.

WARNING

Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock, fire, or other hazards.

Under no circumstances should the original design be modified or altered without written permission from AOC. AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.

Servicer assumes all liability.

FOR PRODUCTS CONTAINING LASER:

DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM.

CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION -The use of optical instruments with this product will increase eye hazard.

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL.

Take care during handling the LCD module with backlight unit

-Must mount the module using mounting holes arranged in four corners.

-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen. -Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel.

-Protect the module from the ESD as it may damage the electronic circuit (C-MOS). -Make certain that treatment person’s body is grounded through wristband.

-Do not leave the module in high temperature and in areas of high humidity for a long time. -Avoid contact with water as it may a short circuit within the module.

-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

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1. Monitor Specifications

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2. LCD Monitor Description

The LCD MONITOR will contain a main board and a key board which house the flat panel control logic, brightness control logic and DDC.

Monitor Block Diagram

LED Drive.

Flat Panel and

LED backlight

Main Board
		Key Board

		D-SUB
Adapter		Signal

AC-IN 100V~24

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3. Operating Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.

3.2 Hotkeys

Power

Press the Power button to turn on/off the monitor.

Menu/Enter

Press to display the OSD or confirm the selection

Eco (DCR)/-

Press the Eco key continuously to select the Eco mode of brightness and DCR on when there is no OSD. (Eco mode hot key may not be available in all models).

4:3 or Wide/+

When there is no OSD, press > continuously to change 4:3 or wide image ratio. (If the product screen size is 4:3 or input signal resolution is wide format, the hot key is disabled to adjust.)

Source/Auto / Exit

Auto / Exit

When the OSD is closed, press Auto/Source/Exit button continuously about 2 second to do auto configure (only for the models with dual or more inputs).

When the OSD is closed, press Auto/Source/Exit button will be Source hot key function (Only for the models with dual or more inputs).

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3.3 OSD Setting

Basic and simple instruction on the control keys.

1)Press the MENU-button to activate the OSD window.

2)Press < or > to navigate through the functions. Once the desired function is highlighted, press the MENU-button to activate sub-menu . Once the desired function is highlighted, press MENU-button to activate it.

3) Press

or to change the settings of the selected function. Press

AUTO to exit. If you want to

adjust any other function, repeat steps 2-3.

4) OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then press power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the monitor is off and then press power button to turn the monitor on.

Notes:

1)If the product has only one signal input, the item of "Input Select" is disable to adjust.

2)If the product screen size is 4:3 or input signal resolution is wide format, the item of "Image Ratio" is disable to adjust.

3)One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.

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Luminance

1

Press

(Menu) to display menu

2

Press

or

to select

(Luminance), and press

to enter

3

Press

or

to select submenu, and press to

enter.

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4

Press or to adjust

5

Press to exit.

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Image Setup

1

Press (Menu) to display menu

2

Press

or

to select

(Image Setup) , and press

to enter.

3

Press or to select submenu, and press to enter.

4

Press or to adjust.

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5

Press	to exit.
		Clock	0-100	Adjust picture Clock to reduce Vertical-Line noise.
		Phase	0-100	Adjust Picture Phase to reduce Horizontal-Line noise
		Sharpness	0-100	Adjust picture sharpness
		H.Position	0-100	Adjust the horizontal position of the picture.
		V.Position	0-100	Adjust the vertical position of the picture.

Color Setup

1

Press (Menu) to display menu.

2

Press

or

to select

(Color Setup), and press

to enter.

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3

Press

or

to select submenu, and press

to enter.

4

Press or to adjust.

5

Press to exit.

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		Warm		Recall Warm Color Temperature from EEPROM.
		Normal		Recall Normal Color Temperature from EEPROM.
		Cool		Recall Cool Color Temperature from EEPROM.
	Color setup.
		sRGB		Recall SRGB Color Temperature from EEPROM.
			Red	Red Gain from Digital-register
		User	Green	Green Gain Digital-register.
			Blue	Blue Gain from Digital-register
		Full	on or off	Disable or Enable Full Enhance Mode
		Enhance
	DCB Mode	Nature Skin	on or off	Disable or Enable Nature Skin Mode
		Green Field	on or off	Disable or Enable Green Field Mode
		Sky-blue	on or off	Disable or Enable Sky-blue Mode
		AutoDetect	on or off	Disable or Enable AutoDetect Mode
	DCB Demo		on or off	Disable or Enable Demo

Picture Boost

1

Press (Menu) to display menu.

2

Press

or

to select

(Picture Boost), and press

to enter.

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3

Press

or

to select submenu, and press

to enter.

4

Press or to adjust.

5

Press	to exit.
		Frame Size	14-100	Adjust Frame Size
		Brightness	0-100	Adjust Frame Brightness
		Contras	0-100	Adjust Frame Contrast
		H. position	0-100	Adjust Frame horizontal Position
		V.position	0-100	Adjust Frame vertical Position
		Bright Frame	on or off	Disable or Enable Bright Frame

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OSD Setup

1

Press (Menu) to display menu.

2

Press

or

to select

(OSD Setup), and press

to enter.

3

Press or to select submenu, and press to enter.

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4

Press or to adjust.

5

Press	to exit.
	H.Position	0-100	Adjust the horizontal position of OSD
	V.Position	0-100	Adjust the vertical position of OSD
	Timeout	5-120	Adjust the OSD Timeout
	Transparence	0-100	Adjust the transparence of OSD
	Language		Select the OSD language

Extra

1

Press

(Menu) to display menu.

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